Science should be distiguished from technique and its scientific instrumentation, technology. Science is practised by scientists, and techniques by 'engineers' — a term that in our terminology includes physicians, lawyers, and teachers. If for the scientist knowledge and cognition are primary, it is action and construction that characterises the work of the engineer, though in fact his activity may be based on science. In history, technique often preceded science.

Hans Freudenthal (1978). Weeding and Sowing. Preface to a Science of Mathematical Education; As cited in: Ben Wilbrink (2013) "Hans Freudenthal Aantekeningen bij zijn publicaties".